Campacasa

Yesterday I have also finished the section with preamplifier, envelope follower and ring modulator:

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The next section I've done is the VCA:

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Next to the VCF section is the ADSR and AR section, which I've finished now, too:

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Now that I have all components available, I was able to build up the three VCOs, attaching the small boards with the according connectors to the main board:

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More than one month has passed, but finally I have managed to get all the required components. I was still missing the 2N4125 transistors for the small VCO boards and 4 ceramic capacitors of 5pF. As replacement for latter I got some 5.1pF capacitors through some relatives in the …

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Today my order from Thonk arrived. A lot of jacks, the tempco resistors (incl. a spare one) and the potentiometer for the pre-amplifier:

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At Mod Wiggler I've found some hints and a circuit for transistor matching. I've built that circuit on stripboard and now can start with the transistor matching: The TTSH design uses various pairs of 2N3904 and 2N3906 transistors. These pairs should each have a very similar base-emitter voltage (within 2 mV difference).

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Many components are available now, a few remaining that are still missing should arrive soon. It's about time to start soldering. Before doing so, I have sorted all resistors and capacitors:

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Today the second Mouser delivery arrived. As written earlier, for some unknown reasons they had split my single order. Now I got the remaining resistors and headers:

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For some unknown reasons Mouser had split my single order into two parts. The first, largest part arrived today. The rest should arrive soon, too. The box is just a box:

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